What is the direction of hinge force?

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Discussion Overview

The discussion revolves around determining the direction of the hinge force acting on a disc that is hinged at a point on its circumference and undergoing rotational motion due to gravity. The scope includes conceptual understanding and technical reasoning related to forces in rotational dynamics.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant inquires about how to find the direction of the hinge force on a rotating disc.
  • Another participant suggests that the hinge force will depend on the movement of the hinged object, indicating it will adjust to keep the hinged point fixed.
  • A different participant interprets the question as relating to the force causing the rotational motion and proposes that the direction of the frictional force is tangent to the disc at the point of contact.
  • One participant requests a sketch to clarify the situation further.

Areas of Agreement / Disagreement

There is no consensus on the specifics of the hinge force direction, and multiple interpretations of the original question exist among participants.

Contextual Notes

Some assumptions about the system's configuration and the forces involved remain unspecified, and the discussion does not resolve the mathematical or conceptual details regarding the hinge force.

ajaysabarish
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how to find direction of hinge force?
for example ,if a disc is hinged at a point on it's circumference and is exhibiting a rotational motion due to gravity,what is the hinge force?
 
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This depends on the movement of the hinged object. It will be whatever it needs to be in order to keep the hinged point fixed.
 
Although I did not fully understand the question you are asking, I will assume you are asking the force causing the rotational motion of a disc on a surface, which is perpendicular to the edge of the disc. In that case you can think of the direction of the frictional force as the tangent line to the disc at the point of contact. Hopefully this was the question you were asking, if it weren't could you please rephrase the question?
 
Can we have a sketch?
 

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